| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alan Kaplan | Crew | Production | Producer's Assistant |
Alun Falconer | Crew | Crew | Additional Dialogue |
 Ben Barzman | Crew | Writing | Screenplay |
Betty Glasow | Crew | Costume & Make-Up | Hairdresser |
Brian West | Crew | Camera | Camera Operator |
Carlo Martelli | Crew | Sound | Original Music Composer |
David Middlemas | Crew | Production | Production Supervisor |
 Frédéric Grendel | Crew | Writing | Novel |
George Frost | Crew | Costume & Make-Up | Makeup Supervisor |
Gerard Schurmann | Crew | Sound | Original Music Composer, Conductor |
 Laurence Harvey | Crew | Directing | Director, Additional Dialogue, Producer |
Manuel Baquero | Crew | Crew | Special Effects |
Moss Mabry | Crew | Costume & Make-Up | Costume Consultant |
 Oswald Morris | Crew | Camera | Director of Photography |
Ralph Kemplen | Crew | Editing | Editor |
Ramiro Gómez | Crew | Art | Art Direction |
Margarita Pardo | Crew | Directing | Continuity |
Jesús García Gárgoles | Crew | Production | Production Manager |
John Quested | Crew | Directing | Assistant Director |
Arthur Beavis | Crew | Crew | Special Effects |
Janet Davidson | Crew | Sound | Sound Editor |
Brendan Redmond | Crew | Sound | Sound Mixer |
Pedro Vidal | Crew | Directing | Assistant Director |
Gordon Davie | Crew | Sound | Assistant Sound Editor |
 Barta Barri | Cast | Actor | Death House Guard |
 Carlos Casaravilla | Cast | Actor | Ramades |
 Fernando Rey | Cast | Actor | Sanchez |
 Fernando Sancho | Cast | Actor | Shaoush |
 Jack MacGowran | Cast | Actor | O'Brian |
 James Brown | Cast | Actor | Gendarme |
 John Ireland | Cast | Actor | Prison Warden |
 José Guardiola | Cast | Actor | Gate Guard |
 José Manuel Martín | Cast | Actor | Gendarme |
 José Nieto | Cast | Actor | Inspector |
 José Riesgo | Cast | Actor | Guard |
 Juan Olaguivel | Cast | Actor | Gendarme |
Laurence Harvey | Cast | Actor | Sean McKenna |
 Lee Patterson | Cast | Actor | Nicky |
 Murray Melvin | Cast | Actor | Gendarme |
 Noel Purcell | Cast | Actor | Finigan |
 Phil Posner | Cast | Actor | Prison Official |
 Rafael Albaicín | Cast | Actor | Gendarme |
Ricardo Rodríguez | Cast | Actor | Gendarme |
 Robert Rietti | Cast | Actor | Sanchez / Chief Warden |
 Robert Walker Jr. | Cast | Actor | Dominic |
 Ross Martin | Cast | Actor | Le Caq |
 Sarah Miles | Cast | Actress | Catherine |
 Eduardo García | Cast | Actor | Truck Driver |
 Xan das Bolas | Cast | Actor | |
Enrique Closas | Cast | Gendarme | |
Edward St. John | Cast | Special Guard | |
Carlos Chemenal | Cast | Gendarme | |
Francisco Montalvo | Cast | Guard | |
Jose Trinidad | Cast | Police Chauffeur | |
Juan García Delgado | Cast | Gendarme | |
Manuel Pêra | Cast | Gendarme | |
| Person | Type | Job | Role(s) |
